A rebate arrangement has been entered into with vendor 12345 with regard to the vendor sub-range XY. This is valid for the entire calendar year. When a purchase order is created for article 22222 on Feb. 10, the system recognizes that article 22222 belongs to vendor sub-range XY, and that the rebate arrangement 5 is valid at this point in time. When the vendor’s invoice created on the basis of this PO is subsequently released for payment, the cumulative business volume data is updated as outlined above.

Updating is carried out for each condition at the level of vendor, site, and tax rate in the rebate arrangement currency and the unit of measure of the condition. At the same time, the figures are cumulated separately for each settlement period. However, if settlement is effected less frequently than monthly, the update data is still cumulated on a monthly basis. This ensures the availability of monthly statistical information.